/Engine/Source/Runtime/Core/Public/Containers/Map.h
Finds all values associated with the specified key.
template<typename Allocator> void MultiFind ( [KeyInitType](API\Runtime\Core\Containers\TMapBase\KeyInitType) Key, [TArray](API\Runtime\Core\Containers\TArray)< ValueType, Allocator > & OutValues, bool bMaintainOrder ) const